Electrical connector with a shielding shell

ABSTRACT

An electrical connector has an insulator with a base portion, a main surface, and a mating portion formed on the main surface. A pair of blocks are formed at opposite ends of the base portion. Each block has a receiving surface parallel to an installation surface perpendicular to the main surface. The installation surface makes contact with a surface of a printed circuit board when the electrical connector is mounted on the printed circuit board. A plurality of electroconductive contacts are disposed on the mating portion. An electroconductive shell is attached to the base portion for surrounding the mating portion. A pair of flanges are formed at opposite ends of the shell and are received by the receiving surfaces of the blocks. A pair of electroconductive hook lugs are attached to the blocks. A pair of electroconductive holding members are mounted on side surfaces of the blocks and have portions extending in a plane including the installation surfaces. A pair of connecting members electrically connect the hook lugs and flanges. The holding members and side surfaces of the hook lugs are electrically connected.

This application is a division of application Ser. No. 07/911,889, filedJul. 10, 1992, now abandoned.

BACKGROUND OF THE INVENTION

This invention relates to an electrical connector having a shell forelectromagnetic shield and, in particular, to such an electricalconnector for use on a printed circuit board having a ground pattern towhich the shell is connected.

A conventional electrical connector with a shell generally comprises aninsulator and the shell attached to the insulator. The insulator has abase portion, a fitting or mating portion formed on a main surface ofthe base portion and fitting to, or mating with, a mating connector, anda pair of blocks formed at longitudinal opposite ends of the baseportion.

Each of the blocks has an installation surface perpendicular to the mainsurface. The mating portion is equipped with a plurality ofelectroconductive contacts.

The shell is made of a metallic plate and fitted onto the mating portionto electromagnetically shield the contacts. The shell comprises atubular portion for covering or surrounding the mating portion, and aflange radially extending from a peripheral edge of the tubular portionand received by the main surface. The longitudinal opposite ends of theflange extend as flange end portions onto, and received by, receivingsurfaces of the blocks. The base portion has a pair of base surfaces atupper and lower sides thereof. Each of the base surfaces is providedwith a plurality of projections. A plurality of coupling portions areformed to extend from the flange portion of the shell along the basesurfaces for one-to-one engagement with the projections. Each of thecoupling portions is formed into a lug having a slot into which thecorresponding projection is fitted.

In order to attach the shell to the insulator, the shell is fitted ontothe mating portion. In the fitting operation, the coupling portions arefirstly brought into contact with the projections and then urged by theprojections to be elastically deformed so that the tubular portion issubjected to a force to partially expand the peripheral edge. When thecoupling portions are further forced to pass over the projections, theprojections are snapped into the slots to make engagement with thecoupling portions.

In the meanwhile, the above-mentioned electrical connector with a shellis for use in an electronic apparatus and is required small in size andthin in shape. This is because of a demand for effective utilization ofa space in a small-sized apparatus.

However, if the electrical connector with a shell is formed small andthin, the shell is inevitably formed of a metal plate having a reducedthickness. In this situation, the shell is readily deformed whensubjected to a force to expand an opening edge of the tubular portion ofthe shell, for example, in the fitting operation of the shell to theinsulator.

The conventional electrical connector with a shell is often used onto aprinted circuit board in the prior art.

There are known two types of mounting arrangement for mounting theelectrical connector with a shell onto a surface of the printed circuitboard.

According to one type, a pair of electroconductive hook lugs arerespectively attached to the blocks formed on longitudinal opposite endsof the base portion. Each of the hook lugs is provided with a hook pin.Each hook pin has leg portions adapted to pass through a through holeformed on the printed circuit board. An engagement piece is formed on anend of each leg portion and is protruded from a rear surface of theprinted circuit board. The engagement pieces of each hook pin are fixedonto the rear surface of the printed circuit board by means ofsoldering.

Terminal portions of the contacts pass through the printed circuit boardto be connected to a wiring pattern formed on the rear surface of theprinted circuit board. The shell is electrical connected to a groundpattern on the rear surface of the printed circuit board through thehook lugs, the hook pins, and screws for mounting the connector onto apanel of an apparatus.

In this type, since the hook pins are bonded by soldering onto the rearsurface of the printed circuit board while the electrical connectorbeing mounted on the opposite surface of the printed circuit board,infrared-radiation reflowing can not be used for connecting the hookpins to the ground pattern by soldering.

In another known structure for mounting the conventional electricalconnector with a shell, the insulator is positioned on the printedcircuit board by means of positioning pins formed at a bottom of theinsulator. Each block is provided with a holding member at a sidethereof. The holding member is bonded by soldering on the printedcircuit board, so that the insulator is fixed to the printed circuitboard.

Terminal portions of contacts are for connection with a wiring patternformed on the top surface of the printed circuit board and extend on,and are bonded to, the wiring pattern by soldering.

In the mounting structure, it is difficult to assure tight contactbetween the insulator and the printed circuit board. The extending endsof the terminal portions often float up before soldering. This resultsin non-uniform contact between the top ends of the terminals portions ofthe contacts and the wiring pattern on the printed circuit board.

As described, it is impossible in the conventional electrical connectorwith a shell to suppress floating of the top ends of the terminalportions before soldering. As a result, it is difficult to assurereliable connection between the contacts and the wiring pattern on theprinted circuit board.

SUMMARY OF THE INVENTION

It is therefore an object of this invention to provide an electricalconnector with a shell, which is capable of preventing deformation ofthe shell of a thin plate and has a sufficient mechanical strength.

It is another object of this invention to provide an electricalconnector for connection with a printed circuit board, which can readilyperform electrical conduction between the shell and a wiring pattern onthe printed circuit board and between the contacts and the wiringpattern on the printed circuit board without floating of contacts.

According to a first feature of this invention, an electrical connectorwith a shell comprises an insulator having a base portion with a mainsurface and a mating portion formed on the main surface of the baseportion, a plurality of electroconductive contacts formed in the matingportion, an electroconductive shell attached to the base portion forsurrounding the mating portion, the base portion having opposite basesurfaces perpendicular to the main surface, first engaging means forengaging the base surfaces and the shell with each other, and secondengaging means for engaging the base surface and the shell with eachother and for suppressing deformation of the shell in the plane of themain surface.

According to this invention, the first engaging means favorablycomprises projections formed on the base surfaces, and coupling portionsformed on the shell in one-to-one correspondence to the projections andengaged with the projections.

According to this invention, the second engaging means favorablycomprises receiving portions formed in the main surface, and projectingportions formed on the shell at positions corresponding to the receivingportions and received in the receiving portions.

According to a second feature of this invention, an electrical connectorwith a shell comprises an insulator having a base portion with a mainsurface and a mating portion formed on the main surface of the baseportion, a pair of blocks formed at opposite ends of the base portion,each of the blocks having a receiving surface parallel to the mainsurface and an installation surface perpendicular to the main surface, aplurality of electroconductive contacts disposed in the mating portion,an electroconductive shell attached to the base portion for surroundingthe mating portion, a pair of flanges formed at opposite ends of theshell and received by the receiving surfaces of the blocks, a pair ofelectroconductive hook lugs attached to the blocks, a pair ofelectroconductive holding members which are mounted on side surfaces ofthe blocks and extend in parallel to the installation surfaces, a pairof connecting members for electrically connecting the hook lugs and theflanges, and connecting means for electrically connecting the holdingmembers and side surfaces of the hook lugs.

According to this invention, each of the blocks favorably has a grooveformed on its side surface for receiving a corresponding one of theholding members. Each of the holding members has a mounting plate to befitted into the groove, a contact piece formed on the mounting plate forelastic contact with the side surface of the hook lug to serve as theconnecting means, and a connecting plate to be connected to a groundpattern on a printed circuit board.

According to this invention, the electrical connector with a shellfavorably comprises, as means for fixing the electrical connector ontothe printed circuit board, hook pins to be engaged with through holesformed on the printed circuit board. The hook pins are attached to thehook lugs and project from the installation surfaces. The hook pins areprovided at their projecting ends with engagement pieces to be engagedwith the through holes.

BRIEF DESCRIPTION OF THE DRAWING

FIG. 1 is a perspective view of a conventional electrical connector witha shell;

FIG. 2 is a plan view of another conventional electrical connector witha shell;

FIG. 3 is a front view of the conventional electrical connector with ashell in FIG. 2 when it is mounted on a printed circuit board;

FIG. 4 is a front view of a yet another conventional electricalconnector with a shell;

FIG. 5 is an enlarged rear view of a part of the conventional electricalconnector with a shell in FIG. 4;

FIG. 6 is an exploded perspective view of an electrical connector with ashell according to a first embodiment of this invention;

FIG. 7 is a sectional view of the electrical connector with a shell inFIG. 6 when it is assembled together;

FIG. 8 is a plan view showing a main portion of an electrical connectorwith a shell according to a second embodiment of this invention;

FIG. 9 is a front view of the electrical connector with a shell in FIG.8;

FIG. 10 is a side view of the electrical connector with a shell in FIG.8;

FIG. 11 is a sectional view of the electrical connector with a shelltaken along a line XI--XI in FIG. 8;

FIG. 12 is a plan view for describing a contact state between a hook lugand a holding member in FIG. 8 in detail;

FIG. 13 a front view of the contact state in FIG. 12;

FIG. 14 is an enlarged rear view of a part of the electrical connectorwith a shell in FIG. 8;

FIG. 15 is a perspective view of hook lugs respectively attached to apair of blocks of the electrical connector with a shell in FIG. 8; and

FIG. 16 is a side view of a holding member used in the electricalconnector with a shell in FIG. 8.

DESCRIPTION OF THE PREFERRED EMBODIMENT

For a better understanding of this invention, description will at firstbe made as regards a conventional electrical connector with a shell withreference to FIGS. 1 through 5.

Referring to FIG. 1, an electrical connector with a shell generallycomprises an insulator 1 and a metallic shell 2 attached to theinsulator 1. The insulator 1 comprises a base portion 3 of an elongatedplate, a mating portion 6 formed on a main surface (not shown) of thebase portion 3, and a pair of blocks 7 formed on longitudinal oppositeends of the base portion 3. Each of the blocks 7 has an installationsurface 81 perpendicular to the main surface. The blocks 7 extend in adirection opposite the mating portion 6 with reference to the mainsurface.

The mating portion 6 is equipped with a plurality of electroconductivecontacts 9 arranged in two rows along a longitudinal direction of thebase portion 3. Each of the contacts 9 has a contact portion (not shown)disposed in the mating portion 6, an intermediate portion held by thebase portion 3, and a terminal portion 11 outwardly extending from arear side of the main surface.

The shell 2 is formed of a metallic plate and has a tubular portion 12for surrounding the mating portion 6 and a flange 13 radially extendingfrom a peripheral edge of the tubular portion 12 and being received bythe main surface. The flange 13 has a pair of flange end portions 14formed at opposite ends of the flange 13 to extend onto, and receivedby, receiving surfaces of the blocks 7. Each of the flange end portions14 is provided with an insertion hole 141.

The base portion 3 has an upper and a lower surface as a pair of basesurfaces 5. An engaging arrangement is formed on each of the basesurfaces 5 and on the flange 13 of the shell 2 for mutual engagementthereof. More specifically, the engaging arrangement comprises threeprojections 15 formed on each base surface 5. The flange 13 of the shell2 is provided with six coupling portions 16 (three of them are viewed inFIG. 1) in one-to-one correspondence to the three projections 15 on eachbase surface 5. Each of the coupling portions 16 is provided with a slot18 for receiving and engaging the corresponding projection 15.

In order to assemble the shell 2 to the insulator 1, the shell 2 isfitted onto and pushed to the mating portion 6. In the operation, thecoupling portions 16 are firstly brought into contact with theprojections 15 and then urged by the projections 15 to be elasticallydeformed. When the coupling portions 16 are further forced to pass overthe projections 15, the projections 15 snap fit into the slots 18 tomake engagement with the coupling portions 16.

As already described, the shell 2 is subjected to a force to expand anopening edge of the tubular portion 12.

Referring to FIGS. 2 through 5, two types of the conventional electricalconnectors with a shell will be described which are to besurface-mounted on a printed circuit board 22. Although these electricalconnectors comprises components different in size from the electricalconnector with a shell shown in FIG. 1, an insulator 1 and a shell 2 aresimilar in structure to those described in conjunction with FIG. 1. Inthis connection, the similar parts are designated by like referencenumerals and the description of the structure will partially be omitted.

Referring to FIGS. 2 and 3, one type of the electrical connector has apair of hook lugs 20 attached to the blocks 7, respectively. Each of thehook lugs 20 is provided with a hook pin 21. Each hook pin 21 are madeto pass through a corresponding one of through holes 23 formed on theprinted circuit board 22 to be engaged with a rear surface of theprinted circuit board 22. More specifically, each hook pin 21 has a pairof leg portions 24. An engagement piece 25 is formed on an end of eachof the leg portions 24. The engagement pieces 25 of the hook pins 21 arefixed to a ground pattern on the rear surface of the printed circuitboard 22 by means of soldering. Thus, the electrical connector is fixedonto the printed circuit board 22.

Contact portions 10 of contacts 9 are brought into contact with matingcontacts of a mating connector (not shown). Terminal portions 11 of thecontacts 9 pass through the printed circuit board 22 to be connected toa wiring pattern formed on the rear surface of the printed circuit board22.

The electrical connector may be fixed to a panel 26 by means of screws27 received in the screw holes 141 in the flange end portions 14 of theshell 2. The screws 27 is also connected to the hook lugs 20. Therefore,the shell 2 and the ground pattern are electrically connected throughthe screws 27, the hook lugs 20, and the hook pins 21.

In the electrical connector as shown in FIGS. 2 and 3, the hook pins 21are bonded by soldering onto the rear surface of the printed circuitboard 22. On the other hand, a body of the electrical connector ismounted on the opposite surface of the printed circuit board 22.Accordingly, when creamy solder is put on the printed circuit board 22and is subjected to soldering, infrared-radiation reflowing can not beused.

Referring to FIGS. 4 and 5, in another type of the conventionalelectrical connector, the insulator 1 is positioned on a printed circuitboard 22 by means of positioning pins 31 formed at a bottom of theinsulator 1. Each of blocks 7 is provided with a holding member 32 at aside thereof. The holding member 32 is bonded to a ground pattern on theprinted circuit board 22 by means of soldering. Thus, the electricalconnector is fixed onto the printed circuit board 22. The terminalportions 11 of contacts 9 extend over the printed circuit board 22, andextending ends 112 of terminal portions 11 are kept at a level flushwith a top surface of the printed circuit board 22, or slightly higherthan the top surface of the printed circuit board 22. Herein, thecontact portions 10 are socket portions to be brought into contact withmating contacts while the terminal portions 11 are bonded by solderingto a wiring pattern formed on the top surface of the printed circuitboard 22.

In the electrical connector in FIGS. 4 and 5 using the holding member 32for fixing the insulator 1 onto the printed circuit board 22, it isdifficult to assure tight contact between the insulator 1 and theprinted circuit board 22. Accordingly, the extending ends 112 of theterminal portions 11 often float up over the wiring pattern of theprinted circuit board 22 before soldering. This results in non-uniformcontact between the extending ends 112 of the terminal portions 11 andthe wiring pattern on the printed circuit board 22.

Referring to FIGS. 6 and 7, description will now be made as regards anelectrical connector with a shell according to a first embodiment ofthis invention. In the first embodiment, the similar parts aredesignated by like reference numerals as described in conjunction withFIG. 1.

The electrical connector comprises an insulator 1 and anelectroconductive metallic shell 2 attached to the insulator 1. Theinsulator 1 comprises a base portion 3 of an elongated plate. The baseportion 3 has a main surface 4 and a pair of base surfaces 5 which arean upper and a lower surface perpendicular to the main surface 4. Amating portion 6 is formed on the main surface 4 of the base portion 3.A pair of blocks 7 are respectively formed on longitudinal opposite endsof the base portion 3. Each of the blocks 7 has a receiving surface 8parallel to the main surface 4 and an installation surface 81perpendicular to the main surface 4. Installation surface 81 is broughtinto contact with a surface of printed circuit board 22 when theelectrical connector is mounted on the printed circuit board 22. Theblocks 7 extend in a direction opposite the mating portion 6 withreference to the main surface 4. The mating portion 6 is provided with aplurality of electroconductive contacts 9 (see FIG. 1) arranged in tworows along a longitudinal direction of the base portion 3. Each of thecontacts 9 has a contact portion 10 (see FIG. 4) disposed in the matingportion 6, an intermediate portion held by the base portion 3, and aterminal portion 11 (see FIG. 1) outwardly extending from a rear side ofthe base portion 3.

The shell 2 is formed of a metallic plate and has a tubular portion 12for covering and surrounding the mating portion 6, and a flange 13radially extending from a peripheral edge of the tubular portion 12 andbeing received by the main surface 4. The flange 13 has flange endportions 14 extending from opposite ends of the flange 13 onto thereceiving surfaces 8.

A first engaging arrangement is formed on the base surfaces 5 and on theshell 2 for mutual engagement thereof. More specifically, the firstengaging arrangement comprises three projections 15 formed on one of thebase surfaces 5. The three projections 15 are respectively located atlongitudinal opposite ends of the base surface 5 and an intermediateportion therebetween. Three projections are formed on the other of thebase surfaces 5 in the similar form. The flange portion 13 of the shell2 is provided with six coupling portions 16 (three of them are shown) inone-to-one correspondence to the six projections 15. Each of thecoupling portions 16 is provided with a slot 18 for receiving thecorresponding projection 15.

A second engaging arrangement is formed on the main surface 4 and on theshell 2 for mutual connection therebetween and for suppression ofdeformation of the shell 2 in the plane on the main surface 4. Thesecond engaging arrangement comprises four receiving portions 36 (two ofthem are viewed in FIG. 6) formed in the main surface 4, and fourprojecting portions 37 (two of them are viewed in FIG. 6) formed on theflange 13 at positions corresponding to the receiving portions 36. Theprojecting portions 37 are received in the receiving portions 36. InFIG. 6, each of the receiving portions 36 is a rectangular slit. Two ofthe receiving portions 36 are located on the main surface 4 at bothsides of the intermediate projection 15 formed on one of the basesurfaces 5. The other of the receiving portions 36 are also located onthe main surface 4 at both sides of the intermediate projection formedon the other of the base surfaces 5.

In order to assemble the shell 2 to the insulator 1, the shell 2 isfitted onto the mating portion 6 in a direction depicted by an arrow Gin FIG. 6. In the fitting operation, the coupling portions 16 arebrought into contact with the projections 15 and then urged by theprojections 15 to be elastically deformed in the plane on the mainsurface 4. When the coupling portions 16 are further forced to pass overthe projections 15, the projections 15 are snap fitted into the slots18. Simultaneously, the projecting portions 37 are received in andengaged with the receiving portions 36. Therefore, the tubular portion12 is suppressed from deformation or expansion due to, for example,deformation of the coupling portions.

The illustrated electrical connector is a receptacle connector and themating portion 6 is inserted inside the shell 2. Accordingly, inwarddeformation of the shell 2 is suppressed by the mating portion 6. On theother hand, the receiving portions 36 serve particularly to suppressoutward expansion of the shell 2 as depicted by an arrow B in FIG. 7. Adistance C between the projecting portion 37 and the receiving portion36 is selected to be substantially small.

In application of the second engaging arrangement onto a plug connector,both outward and inward deformation of the shell can be restricted

Each receiving portion 36 may be a groove instead of the rectangularslit inasmuch as the receiving portion 36 can suppress deformation ofthe shell 2.

The projecting portions 37 may be connected not to the flange 13 but toa peripheral edge of the tubular portion 12 and inserted into thereceiving portions 36.

According to the electrical connector of FIGS. 6 and 7, the deformationof the shell 2 is suppressed even if the shell 2 is subjected to anexternal force. As a result, the electrical connector can be formed in athin shape with a sufficient mechanical strength.

FIGS. 8 through 16 show an electrical connector according to a secondembodiment of this invention. Although this electrical connectorcomprises components different in size from the electrical connectorwith a shell shown in FIG. 6, an insulator 1 and a shell 2 are similarin structure to those described in conjunction with FIG. 6. In thisconnection, the similar parts are designated by like reference numeralsand the description of the structure will partially be omitted.

Referring to FIGS. 8 through 14, the electrical connector with a shellhas a pair of blocks 71 formed at opposite sides of a base portion 3.Each of the blocks 71 is provided with an electroconductive hook lug 20which is also shown in FIG. 15. A large receiving hole 72 is formed ineach block 71 for insertion of the hook lug 20. On a side surface ofeach block 71 is mounted an electroconductive holding member 89 which isin electrical contact with the hook lug 20.

Each holding member 89 is located on the printed circuit board hasportions extending in a plane including the installation surface 81. 22.

As shown in FIGS. 12 and 13, each hook lug 20 is provided with a screwhole 90 facing the insertion hole 141 of the flange end portion 14. Thehook lug 20 and the flange end portion 14 of the shell 2 areelectrically connected to each other through the screw 27 which isthreaded in the screw hole 90 through the insertion hole 141 so as tomount the connector onto the panel 26 of an apparatus.

Each hook lug 20 is provided with a hook pin 21 which is engagedtherewith and which is to be engaged with a through hole 23 formed inthe printed circuit board 22. A holding groove 73 is formed on aninstallation surface 81 of each hook lug 20 to receive and hold a headof the hook pin 21. A penetrating hole 74 is formed in each hook lug 20to penetrate therethrough from one surface to the opposite surface ofthe hook lug 20. Although not shown in the figure, a bolt may beinserted through the penetrating hole 74 so as to fix the insulator 1 tothe printed circuit board 22. The two hook lugs 20 have a similar shapeand mounted in the receiving holes 72 of the left and the right blocks71 to be symmetrical with each other.

As shown in FIG. 9, each hook pin 21 has a pair of engagement pieces 75at a head portion thereof. Inside these engagement pieces 75, a pair ofleg portions 76 downwardly extend to project from a bottom surface ofthe insulator 1. A pair of engagement projections 77 are respectivelyformed at extending ends of a pair of the leg portions 76.

A groove 79 is formed in a side surface of each block 71 to receive theholding member 89. As shown in FIG. 16, each holding member 89comprises, in an integral fashion, a mounting plate 80 pressed into andfitted in the groove 79, a contact piece 84 formed by cutting andbending a center portion of the mounting plate 80 and elasticallyconnected to the hook lug 20, and an installation plate 82 which extendsin a plane including the installation surfaces 81 and which is broughtinto contact with the ground pattern on the printed circuit board 22. Aplurality of mounting pieces 83 are formed at both ends of each mountingplate 80 and elastically pressed into the groove 79 of the block 71. Aninner end of the contact piece 84 is brought into press contact with aside surface of the hook lug 20 as illustrated in FIGS. 12 and 13 indetail.

When the electrical connector in FIG. 9 is mounted on the printedcircuit board 22, positioning pins 31 formed at a bottom of theinsulator 1 are inserted into positioning holes (not shown) formed onthe printed circuit board 22. Thus, the insulator 1 is positioned on theprinted circuit board 22. The pair of engagement projections 77 of thehook pin 21 are inserted into the through hole 23 formed on the printedcircuit board 22 and engaged with an inner wall of the through hole 23.Thus, the electrical connector is tightly fixed to the printed circuitboard 22. In other words, the electrical connector is formed by the hookpin 21 to be pressed against the printed circuit board 22 together withcontacts 9. Accordingly, the contacts 9 are prevented from verticallyswinging or floating over the printed circuit board 22. As a result, theextending ends 112 of terminal portions 11 are reliably and uniformlybrought into tight contact with the wiring pattern on the printedcircuit board 22. Simultaneously, each holding member 89 is brought intotight contact with the ground pattern on the printed circuit board 22.In this state, creamy solder is put on the printed circuit board 22 andis subjected to soldering in a suitable manner. Thus, the contacts 9 andthe installation plates 82 of the holding members 89 are respectivelyconnected to the corresponding wiring and ground patterns by soldering.

When each holding member 89 is bonded by soldering to the ground patternon the printed circuit board 22, the ground pattern and the shell 2 aremutually electrically connected through a path formed by the contactpiece 84, the hook lug 20, and the screw 27. In this event, a groundsignal is directed through the above-mentioned path finally to theground pattern on the printed circuit board 22. Due to presence of thecontact piece 84 formed on the holding member 89, the shell 2 and theground pattern on the printed circuit board 22 are readily connectedthrough the contact piece 84 and the holding member 89.

By the use of the hook pin 21, the electrical connector is forced by thehook pin 21 coupled to the through hole 23 to be tightly attached ontothe printed circuit board 22 with a sufficient holding force.Accordingly, the extending ends 112 of the terminal portions 11 areprevented from floating up from the printed circuit board 22. As aresult, it is possible to reliably and tightly connect the contacts 9 tothe wiring pattern on the printed circuit board 22 by successfulsoldering.

What is claimed is:
 1. An electrical connector, comprising an insulatorhaving a base portion with a main surface and a mating portion formed onsaid main surface of said base portion, a pair of blocks formed atopposite ends of said base portion, each of said blocks having areceiving surface parallel to said main surface and an installationsurface perpendicular to said main surface, said installation surfacemaking contact with a surface of a printed circuit board when saidelectrical connector is mounted on the printed circuit board, aplurality of electroconductive contacts disposed on said mating portion,an electroconductive shell attached to said base portion for surroundingsaid mating portion, a pair of flanges formed at opposite ends of saidshell and received by said receiving surfaces of said blocks, a pair ofelectroconductive hook lugs attached to said blocks, a pair ofelectroconductive holding members which are mounted on side surfaces ofsaid blocks and which have portions extending in a plane including saidinstallation surfaces, a pair of connecting members for electricallyconnecting said hook lugs and said flanges, and connecting means forelectrically connecting said holding members and side surfaces of saidhook lugs.
 2. An electrical connector with a shell according to claim 1,wherein each of said blocks has a groove formed on its side surface forreceiving a corresponding one of said holding members, each of saidholding members having a mounting plate to be fitted into said groove, acontact piece formed on said mounting plate for elastic contact withsaid side surface of said hook lug to serve as said connecting means,and a connecting plate to be connected to a ground pattern on saidprinted circuit board.
 3. An electrical connector with a shell accordingto claim 1, further comprising, as means for fixing said electricalconnector onto said printed circuit board, hook pins to be engaged withthrough holes formed on said printed circuit board, said hook pins beingin engagement with said hook lugs and projecting from said installationsurfaces, said hook lugs being provided at their projecting ends withengagement projections to be engaged with said through holes.